266516131 has 4 divisors (see below), whose sum is σ = 304589872. Its totient is φ = 228442392.

The previous prime is 266516077. The next prime is 266516147. The reversal of 266516131 is 131615662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131615662 = 2 ⋅65807831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266516131 is a prime.

It is a super-2 number, since 2×266516131² = 142061696166418322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266516093 and 266516102.

It is not an unprimeable number, because it can be changed into a prime (266526131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19036860 + ... + 19036873.

It is an arithmetic number, because the mean of its divisors is an integer number (76147468).

Almost surely, 2^266516131 is an apocalyptic number.

266516131 is a deficient number, since it is larger than the sum of its proper divisors (38073741).

266516131 is an equidigital number, since it uses as much as digits as its factorization.

266516131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38073740.

The product of its digits is 6480, while the sum is 31.

The square root of 266516131 is about 16325.3217732454. The cubic root of 266516131 is about 643.5384497826.

The spelling of 266516131 in words is "two hundred sixty-six million, five hundred sixteen thousand, one hundred thirty-one".